Improvement in bolt-machines



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Letters Patent No. 90,661, dated June 1, 1869.

IMPROVEMENT IN BOLT-MACHINES.

The Schedule referred to in these Letters Patent and making part of thesame.

/ To. all whom it may concern:

the heading-device, in combination with an adjustable gauge, that,without changing the dies, rivets of different lengths may be made.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and use.

In the drawings-'-- Figure l is a plan, showing all those parts of therivet-machine to which my invention relates, the actuating-devices beingomitted.

Figure 2 is a perspective of the same, in which the actuating-devicesarerepresented by dotted lines.

In my description, I omit all reference to the actuating-parts of mymachine, and simply describe the tools that do the work.

. G and G represent the bed-plate, to which all the parts are attached.

The feed-device, represented in the vdrawings, consists of ateed-carriage, H, which is provided with two toggles, h h, which are socrranged, that when the carriage moves backward, the will open andhave'no action upon the wire, but when a forward motion is given to H,these toggles will close thgether, and thus grasp the wire and feed itforward.

H is a slide, upon which the feed-carriage moves. A and A are thegriping-dies, which may be operated by toggles, indicated by dottedlines in fig. 2, or

- by any of the ordinary devices.

B and B are cutting-jaws.

The tool I) in B, acts as a support to thewire, while the tool I) in B,moves up and cuts it off.

0 is the header, the motion of which is so timed,

- that when it moves up to head the rivet, the cutters b b arewithdrawn, and the griping-dies A and Al hold the wire firmly in place.

E is a gauge, so arranged, that it is automatically withdrawn, wheneverthe header moves up,

The operation of my machine is as follows:

The wire of which the rivet is to be made, is fed in between thegriping-dies A and A, ,by hand, or by some suitable feeding-device,until it passes sufliciently through the gripers to form the head, thenthe header moves up and makes the head. The header is then withdrawn,until it occupies the posit-ion shown in the drawings. 7

Now, the gripers release the hold of the wi'rgnanrl the wire passesthrough until the head comes in contact with the gauge E, whichregulates the length of the rivet.

The griping-dies again size the wire, the cutters B and B move'up andcut the Wire, leaving the wire projecting beyond the dies sufficientlyto form the head of the next rivet, the rivet dropping through theopenin T.

Ihe header now moves up, and the entire operation is repeated.

By this arrangement of parts the rivet is not cut off until after thehead is formed, and then it may be cut to any desired length, saidlength depending upon the position of the adjustable gauge E.

If desirable, the gauge; E may be dispensed with, the header 0performing that function; that is, the actuating-gear of the header 0may be so arranged, that after the header has performed its function asa header, it may be withdrawn to the distance required by the rivet, andthen act as a gauge.

Having thus described my invention, I now proceed to set forth my claim.What Iclaim as my invention,'and desire to secure by Letters Patent ofthe United States, is-'- The reciprocating lever H and toggles h h, incombination with the holding-jaws A A knives B B, gauge E, andheading-plunger :6, all arranged and operating together, in the mannerdescribed.

JAS. L. HALL.

Witnesses FRANK G. PARKER, A. HUN BERRY.

